The problem, he says, is that they’re not looking deep enough. Now, [Ron] Davis; Rahim Esfandyarpour, a former Stanford research associate; and their colleagues have devised a blood-based test that successfully identified participants in a study with chronic fatigue syndrome. … A paper describing the research findings appears in the Proceedings of the National Academy of Sciences. Davis is the senior author. Esfandyarpour, who is now on the faculty of the University of California-Irvine, is the lead author.